Plants carry out photosynthesis only during the day and respiration only at night.(a)True(b)False Show
Answer Hint: Plants are photosynthetic eukaryotic organisms which include all living things that are not animals and all algae and fungi that are treated as plants. They get energy from the sunlight by the process of photosynthesis and contain chlorophyll A and B that gives them their green color. Complete answer: Additional information: So, the correct answer is 'false'. Note: There are more than 80000 species of edible plants in which 90% of the food is consumed by humans from just 30 species of plant. The first type of painkiller which is used for fever came from the bark of a willow tree which is a type of aspirin. Unlike animals, most plants do not need to find food, because they can make it for themselves. Plants use energy from sunlight to turn water and carbon dioxide into an energy-rich sugar called glucose. This process is called photosynthesis, which means “making things with light”. Photosynthesis takes place inside capsules in the leaf cells, called CHLOROPLASTS. MAKING FOOD AND OXYGENPlants use their leaves to make food. Oxygen is created as a by-product. During photosynthesis, plant leaves take in carbon dioxide from the atmosphere. Using the energy from sunlight, this is combined with water drawn up from the roots to make glucose. Oxygen is also produced in this chemical reaction and exits the leaves into the surrounding air. FOOD-PRODUCING CELLSDifferent plant cells perform different tasks. Palisade cells and spongy cells are located just below the epidermis and are a plant’s main food-producers. The tall palisade cells are packed with green chloroplasts, which carry out photosynthesis. The irregularly shaped spongy cells also have chloroplasts. Air spaces between the cells are filled with carbon dioxide, water vapour and other gases. CHLOROPLASTMany leaf cells contain tiny, lens-shaped organelles called chloroplasts. These can move around the cell towards the direction of sunlight. Chloroplasts contain a green, light-capturing pigment called chlorophyll. This chemical helps the chloroplasts to act like minute solar panels. INSIDE A CHLOROPLASTChloroplasts are made up of stacks of tiny disclike membranes called grana, held in a dense mass of material known as the stroma. The grana are where water is split into hydrogen and oxygen, using some of the light energy captured by the chlorophyll. The rest of the light energy is used in the stroma to combine the hydrogen with the carbon dioxide to make glucose. Water droplets on a leaf (Kyle Szegedi, Unsplash) Water droplets on a leaf (Kyle Szegedi, Unsplash) Plants have specific needs - light, air, water, nutrients, and space - to survive and reproduce. Almost all plants need these five things to survive: LightPlants usually get the light they need from the Sun. But they can also grow in artificial light. Plants use light energy to make a type of sugar called glucose. They use glucose as their energy source. Plants make glucose in a part of their leaf cells called the chloroplast. Each chloroplast contains a green pigment called chlorophyll. It’s what allows the plant to absorb light energy. If a plant doesn’t receive enough light, it will grow very slowly. But too much light can cause the plant and the soil it lives in to dry out. Different plants have different light requirements. Some need bright or direct light. Others can thrive in dimmer or indirect light.
AirAir contains many gases. They include nitrogen, oxygen, carbon dioxide and water vapour. Air is made up of approximately 78 percent nitrogen, 21 percent oxygen, one percent argon and 0.038 carbon dioxide. Air also has very small amounts of neon, helium, krypton, hydrogen and xenon. Using energy from light, plants chemically combine carbon dioxide and water to create glucose and oxygen. This process is called photosynthesis.
WaterPlants need water for photosynthesis. Absorbed by the roots, water travels through a plant’s stems to the chloroplasts in the leaves. Water also helps move nutrients from the soil into the plant. Too little water can cause a plant to wilt or droop. Too much water can cause a plant’s roots to rot.
NutrientsNutrients
are substances that nourish a plant. In particular, plants need nitrogen, phosphorus and potassium. When dissolved in water, these nutrients get absorbed by a plant’s roots. Space to GrowAll living things need space. A plant’s roots need space so that they can spread out and absorb water and nutrients. Its leaves need space so that they access light. When plants grow too close together, they have to compete for these resources. Without enough water, nutrients and light, plants can grow tall and thin or short and stunted. Overcrowded plants tend to be less healthy, which makes them more likely to suffer from disease. Learn MoreWhat Does a Plant Need to Grow? This article by BBC Bitesize, with videos and a quiz, explains why plants are important, and what they need to grow properly. Photosynthesis for Kids This article by Photosynthesis Education explores what's needed for photosynthesis, and what happens during the process. ReferencesWhat are 4 things required for photosynthesis?Photosynthesis requires sunlight, chlorophyll, water, and carbon dioxide gas. Chlorophyll is a substance in all green plants, especially in the leaves. Plants take in water from the soil and carbon dioxide from the air.
What carries out photosynthesis?The organisms that are able to carry out the process of photosynthesis are plants and algae. Plants and algae are the only organisms that possess the cell organelles in which photosynthesis is able to take place.
What are the 5 requirements for photosynthesis?There are four factors which are necessary for the process of photosynthesis, water, carbon dioxide, sunlight, and chlorophyll.
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